Green room temperature synthesis of silver-gold alloy nanoparticles

Traore N, Uttinger M, Cardenas Lopez P, Drobek D, Gromotka L, Schmidt J, Walter J, Apeleo Zubiri B, Spiecker E, Peukert W (2023)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2023

Journal

Nanoscale Advances Royal Society of Chemistry

Publisher: ROYAL SOC CHEMISTRY

DOI: 10.1039/d2na00793b

Abstract

Metallic alloy nanoparticles (NPs) exhibit interesting optical, electrical and catalytic properties, dependent on their size, shape and composition. In particular, silver-gold alloy NPs are widely applied as model systems to better understand the syntheses and formation (kinetics) of alloy NPs, as the two elements are fully miscible. Our study targets product design via environmentally friendly synthesis conditions. We use dextran as the reducing and stabilizing agent for the synthesis of homogeneous silver-gold alloy NPs at room temperature. Our approach is a one-pot, low temperature, reaction-controlled, green and scalable synthesis route of well-controlled composition and narrow particle size distribution. The composition over a broad range of molar gold contents is confirmed by scanning transmission electron microscopy-energy-dispersive X-ray spectroscopy (STEM-EDX) measurements and auxiliary inductively coupled plasma-optical emission spectroscopy measurements (ICP-OES). The distributions of the resulting particles in size and composition are obtained from multi-wavelength analytical ultracentrifugation using the optical back coupling method and further confirmed by high-pressure liquid chromatography. Finally, we provide insight into the reaction kinetics during the synthesis, discuss the reaction mechanism and demonstrate possibilities for scale-up by a factor of more than 250 by increasing the reactor volume and NP concentration.

Authors with CRIS profile

Nabi Traore Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Maximilian Uttinger Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Paola Cardenas Lopez Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Dominik Drobek Sonderforschungsbereich 1411 Produktgestaltung disperser Systeme / Design of Particulate Products Lukas Hartmann Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Jochen Schmidt Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Johannes Walter Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Benjamin Apeleo Zubiri Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Wolfgang Peukert Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik

Additional Organisation(s)

Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

How to cite

APA:

Traore, N., Uttinger, M., Cardenas Lopez, P., Drobek, D., Gromotka, L., Schmidt, J.,... Peukert, W. (2023). Green room temperature synthesis of silver-gold alloy nanoparticles. Nanoscale Advances. https://dx.doi.org/10.1039/d2na00793b

MLA:

Traore, Nabi, et al. "Green room temperature synthesis of silver-gold alloy nanoparticles." Nanoscale Advances (2023).

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